527
FZUS52 KCHS 122250
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
650 PM EDT Sun Oct 12 2025

South Santee River SC to Savannah GA out 20 NM and Savannah GA to
Altamaha Sound GA out 60 NM, including Charleston Harbor and
Grays Reef National Marine Sanctuary

AMZ300-131115-
650 PM EDT Sun Oct 12 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Low pressure along the North Carolina coast will move farther
away from the region tonight. High pressure will extend into the
area Monday and linger into much of the week.

$$

AMZ330-131115-
Charleston Harbor-
650 PM EDT Sun Oct 12 2025

.TONIGHT...NW winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Waves 1 to 2 ft through early Monday morning. Showers
likely this evening, then a chance of showers late this evening.
.MON...NW winds 10 to 15 kt with gusts to 20 kt.
.MON NIGHT...NW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight.
.TUE...N winds 10 kt.
.TUE NIGHT...N winds 5 to 10 kt.
.WED...N winds 5 to 10 kt.
.WED NIGHT...N winds 5 to 10 kt.
.THU...NE winds 10 kt.
.THU NIGHT...NE winds 5 to 10 kt.
.FRI...NE winds 5 to 10 kt.
.FRI NIGHT...SE winds 5 kt.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 71 degrees.

$$

AMZ350-131115-
Waters from South Santee River to Edisto Beach SC out 20 NM-
650 PM EDT Sun Oct 12 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY AFTERNOON...

.TONIGHT...NW winds 20 to 25 kt with gusts to 30 kt, diminishing
to 15 to 20 kt with gusts to 25 kt. Seas 3 to 5 ft. Wave Detail:
N 5 ft at 6 seconds and E 4 ft at 10 seconds. Showers likely this
evening, then a chance of showers late this evening.
.MON...NW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft,
subsiding to 4 to 5 ft in the afternoon. Wave Detail: N 4 ft at
5 seconds and SE 4 ft at 12 seconds, becoming SE 4 ft at
12 seconds and N 3 ft at 5 seconds. A slight chance of showers in
the morning.
.MON NIGHT...NW winds 15 to 20 kt, becoming N 10 to 15 kt after
midnight. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight.
Wave Detail: NE 3 ft at 6 seconds and SE 3 ft at 11 seconds.
.TUE...N winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Wave Detail: NE 3 ft at 6 seconds and SE 3 ft at 10 seconds.
.TUE NIGHT...N winds 10 to 15 kt, increasing to 15 to 20 kt after
midnight. Seas 3 to 4 ft, building to 4 to 5 ft after midnight.
Wave Detail: NE 3 ft at 5 seconds and E 2 ft at 10 seconds,
becoming NE 4 ft at 5 seconds and E 2 ft at 10 seconds.
.WED...N winds 15 to 20 kt, diminishing to 10 to 15 kt in the
afternoon. Seas 4 to 6 ft, subsiding to 4 to 5 ft in the
afternoon. Wave Detail: NE 4 ft at 6 seconds and E 4 ft at
11 seconds, becoming E 5 ft at 11 seconds.
.WED NIGHT...N winds 5 to 10 kt, increasing to 10 to 15 kt with
gusts to 20 kt after midnight. Seas 4 to 5 ft, subsiding to 3 to
4 ft after midnight.
.THU...NE winds 15 to 20 kt. Seas 4 to 5 ft.
.THU NIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft.
.FRI...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.

$$

AMZ352-131115-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
650 PM EDT Sun Oct 12 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT MONDAY...

.TONIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt after
midnight. Seas 3 to 5 ft. Wave Detail: NW 5 ft at 4 seconds and E
4 ft at 11 seconds. A chance of showers until early morning, then
a slight chance of showers late.
.MON...NW winds 15 to 20 kt. Seas 4 to 5 ft. Wave Detail: NW 4 ft
at 4 seconds and E 4 ft at 12 seconds.
.MON NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E
3 ft at 11 seconds and NW 2 ft at 3 seconds.
.TUE...N winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft
at 10 seconds and NE 2 ft at 6 seconds.
.TUE NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: NE
3 ft at 4 seconds and E 3 ft at 10 seconds.
.WED...N winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 9 seconds and NE 3 ft at 5 seconds.
.WED NIGHT...NE winds 5 to 10 kt, increasing to 10 to 15 kt after
midnight. Seas 3 to 4 ft.
.THU...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.THU NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.

$$

AMZ354-131115-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
650 PM EDT Sun Oct 12 2025

.TONIGHT...NW winds 15 to 20 kt. Seas 3 to 5 ft, subsiding to 2
to 4 ft. Wave Detail: E 5 ft at 10 seconds and NW 4 ft at 4
seconds, becoming NW 4 ft at 4 seconds and E 4 ft at 10 seconds. A
chance of showers, mainly this evening.
.MON...NW winds 15 kt with gusts to 20 kt. Seas 4 to 5 ft. Wave
Detail: E 4 ft at 12 seconds and N 3 ft at 5 seconds.
.MON NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 11 seconds.
.TUE...N winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 11 seconds and N 2 ft at 5 seconds.
.TUE NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E
3 ft at 10 seconds.
.WED...N winds 15 to 20 kt, becoming NE 10 to 15 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: NE 3 ft at 5 seconds and
E 3 ft at 9 seconds.
.WED NIGHT...NE winds 5 to 10 kt. Seas 3 to 4 ft.
.THU...NE winds 10 to 15 kt. Seas 4 to 5 ft.
.THU NIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft.
.FRI...NE winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI NIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft.

$$

AMZ374-131115-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
650 PM EDT Sun Oct 12 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY EVENING...

.TONIGHT...NW winds 20 to 25 kt, diminishing to 15 to 20 kt with
gusts to 25 kt. Seas 5 to 7 ft, subsiding to 4 to 6 ft. Wave
Detail: NW 6 ft at 6 seconds and E 6 ft at 10 seconds, becoming NW
5 ft at 5 seconds and E 5 ft at 10 seconds. A chance of showers.
.MON...NW winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft,
subsiding to 5 to 6 ft in the afternoon. Wave Detail: NW 5 ft at
5 seconds and E 4 ft at 10 seconds, becoming N 4 ft at 5 seconds
and E 4 ft at 10 seconds. A slight chance of showers in the
morning.
.MON NIGHT...N winds 10 to 15 kt with gusts to 20 kt. Seas 4 to
6 ft, subsiding to 4 to 5 ft after midnight. Wave Detail: N 4 ft
at 6 seconds and E 3 ft at 11 seconds, becoming E 4 ft at
10 seconds and N 3 ft at 7 seconds.
.TUE...N winds 10 to 15 kt with gusts to 20 kt. Seas 4 to 5 ft.
Wave Detail: NE 5 ft at 10 seconds and N 3 ft at 7 seconds.
.TUE NIGHT...N winds 10 to 15 kt, becoming NE 15 to 20 kt after
midnight. Seas 4 to 5 ft. Wave Detail: NE 4 ft at 6 seconds and
NE 4 ft at 9 seconds.
.WED...N winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft,
building to 5 to 7 ft in the afternoon. Wave Detail: NE 5 ft at
6 seconds and E 5 ft at 9 seconds, becoming NE 6 ft at 9 seconds.
.WED NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Seas 5 to
7 ft, subsiding to 4 to 6 ft after midnight.
.THU...NE winds 15 to 20 kt. Seas 4 to 6 ft.
.THU NIGHT...NE winds 15 kt. Seas 5 to 6 ft.
.FRI...NE winds 10 to 15 kt. Seas 4 to 6 ft.
.FRI NIGHT...E winds 5 to 10 kt. Seas 4 to 5 ft.

$$